BACKGROUND: Current research of mechano growth factor (MGF) mainly focuses on the muscles and nerve damage and repair, and it has bean confirmed that MGF can promote muscle cell hypertrophy and nerve repair significantly. Regarding its role in fracture healing is unclear. OBJECTIVE: To investigate the effect of MGF on radial fracture healing in rabbits. METHODS: By using random digital table method, 12 New Zealand rabbits were divided into 3 groups: blank control group, low-dose MGF group and high-dose MGF group. The models with 5 mm bone defect were produced in the middle of the left radius in rabbits. At 3 days after the surgical operation, the defective areas were given 0.2 mL PBS or 0.2 mL MGF (0.36 and 0.72 g/L) injected into the ends of fracture areas, respectively, once per day for continuous 5 days. At 4, 6, 8 weeks after operation, X-ray photography was used to evaluate the healing of fracture, and the histological examinations were performed at the 8~(th) weak to observe the call morphology at the fracture lesion. RESULTS AND CONCLUSION: At 1 day after operation, the activities of rabbits were reduced, with slightly reduced food intake, at 2 days they almost recovered to normal activities and diet. At 3 days, the surgical incision slightly swelled with a small amount of bleeding and without obvious signs of infection. All 12 rabbits entered the final analysis. X-rays showed that two fracture ends have basically combined in the high-dose MGF group at 4 weeks post-surgery, cortical bone was continuous and fracture lines were unclear. At 6 weaks the bone medullary cavity almost run through and fully run through at 8 weeks. The healing time in the high-dose MGF group was remarkably shorter than that in blank control group and low-dose MGF group, the healing was in high quality. At 8 weeks after operation, a large number of osteoid tissues were observed in the blank control group, a small amount of woven bone formed, at a transition period from the fibrous bone callus to the bony bone callus; a large number of woven bone formed inthe low-dose MGF group, at bony bone callus period; in the high-dose MGF group, a large number of woven bones converted into mature lamellar bone, at the callus rebuilding phase, which was consistent with imaging results. It is indicated that MGF can accelerate fracture healing significantly in a rabbit model and shows a dose-dependent manner in a certain range.

Objective To explore the inhibition of different immunosuppressive drugs or immunosuppressive combination regiments on the development of de novo donor specific antibodies (dnDSA).Methods We used BABL/c mice and C57BL/6 mice alloimmunized using donor splenocytes for establishing model of producing dnDSA.After that,mice were divided into 10 groups,and were administrated with mycophenolate mofetil (MMF,300 mg· kg-1 · d-1);sirolimus (0.3 mg·kg-1 ·d-1);tacrolimus(0.9 mg· kg-1 · d-1);cyclosporine A (45 mg· kg-1 · d-1);MMF (150 mg· kg-1· d-1) + tacrolimus(0.45 mg · kg-1 · d-1);MMF (150 mg · kg-1 · d-1) + cyclosporine A (22.5 mg·kg-1 ·d-1);MMF (150 mg·kg-1 ·d-1) + sirolimus (0.15 mg·kg-1 ·d-1);sirolimus (0.15 mg· kg-1 · d-1) + tacrolimus (0.45 mg· kg-1 · d-1);sirolimus (0.15 mg· kg-1 · d-1) + cyclosporine A (22.5 mg· kg-1 · d-1);and placebo;respectively.Anti-serum was harvested and tested using flow cytometry.Results (1) Four weeks after sensitization,the dnDSA level in BALB/c and C57BL/6 group was 88.86％ and 25.58％.Comparing with control group(25.33％),there was a significant increase in BALB/c group(89.23％ versus 25.33％;P＜0.001),whereas no change was found in C57BL/6 group (25.58％ versus 25.33％;P =0.259),that we chose BABL/c mice as the model for sensitization.(2)After 4 weeks of sensitization and immunosupression,dnDSA level was 29.31％,46.33％,57.10％ and 66.35％ in MMF,sirolimus,cyclosporine A and tacrolimus monotherapy group respectively.In comparison to sensitization group,dnDSA level in all monotherapy arm reduced significantly.Intra-group analysis found MMF monotherapy had the most effective inhibition of dnDSA production,sirolimus came the second,and tacrolimus and cyelosporine A had equivalent effectiveness.dnDSA level was 31.00％,33.12％,45.18％,44.62％ and 61.60％ in MMF+ sirolimus,MMF+ tacrolimus,MMF+ cyclosporine A,sirolimus + cyclosporine A and sirolimus + tacrolimus combination treatment arm,respectively,which was much lower than that of sensitization group (P＜0.001,P＜0.001,P＜0.001,P＜0.001,P =0.015).MMF + tacrolimus and MMF+ sirolimus combination treatment had comparable effectiveness in dnDSA inhibition,which is greater than that of the rest of three combination.Conclusion Our data show that the effects of single immunosuppressive drugs on the level of dnDSA is MMF＞sirolimus＞cyclosporine A =tacrolimus,and that in combination regimens is MMF + tacrolimus =MMF + sirolimus＞MMF + cyclosporine A =sirolimus + cyclosporine A =sirolimus + tacrolimus.In conclusion,this study demonstrates that MMF+ tacrolimus combination treatment arm can minimize the development of dnDSA.But,this conclusion remains to be confirmed by future clinical studies.

Dihydroartemisinin (DHA),the major active metabolite of artemisinin,participates in tumor progression through the following ways:forming free radicals to induce cancer cells death dependent on iron,inducing apoptosis,inhibiting angiogenesis,tumor cells invasion and metastasis,modulating muhidrug resistance,controlling intracellular Ca2+ concentration,regulating cell cycles,cell autophagy and the immune system and so on.Generally,it is considered to be a potential anti-tumor drug.

Optical coherence tomography angiography(OCTA), as a new imaging technology that has emerged in recent years, is characterized by non-invasiveness, high speed and high resolution. Compared with traditional contrast examination, OCTA is faster, safer and avoids the side effects and risks of traditional contrast agents. Now, OCTA has been gradually applied in the diagnosis, treatment and follow-up of eye diseases. Through real-time imaging of retinal choroidal blood vessels, this article reviews the research progress of clinical application of OCTA in diabetic retinopathy.

Objective To explore the reconstructive methods of benign bone tumor defects in proximal joint. Methods Operative treatment was performed in 11 cases with benign bone tumor defects in proximal joint, a-mong whom 4 cases were treated by curettage,cauterization of wall and bone grafting,3 cases were treated by filling branch through segment fibula transplantation with vascular,2 cases were treated by fibula head transplantation with vascular to reconstruct the glenohumeral joint and rediocarpal joint, and 2 cases were treated by artificial joint re-placement. Results The follow-up ranged from 1.5 to 6 years. All of cases got excellent bone unioned without re-lapse and 2 cases of them developed with little limitation in joint function. Conclusion The importance and recon-structive achievement of fibula transplantation in treating the benign bone tumor defects in proximal joint should be thought fully. The indication of artificial tumor prosthesis replacement should be strictly mastered.

BACKGROUND: There are many methods for investigating the physical development and the somatotype of child. Among them, Heath-Carter so matotype method is a comprehensive evaluation method on somatotype. In this method, 10 items of anthropometric indicators are selected from several dozens of items as assessment indicators for development and somatotype.OBJECTIVE: To analyze the rules and characteristics of soma totype development of Hah children in rural area of Huludao city, so as to supplement the essential data for physical anthropology.DESIGN: Normal children were chosen as the subjects, and cross-sectional investigation was carried out.SETTING: Department of Anatomy, Jinzhou Medical College. PARTICIPANTS: With cluster sampling, the Han children between 7 to 10 years old were selected from central primary school of Mingshuixiang Village of Suizhong County of Huludao city from July 2001 to September 2003. All the selected children should be verified healthy by physical examination at school. The children were divided into two groups according to gender, and each group was divided into 4 subgroups according to age,with 46 to 63 members in each group. There were 8 groups altogether.Complete data of 408 children were collected (male 213, female 195).METHODS: Each indicator was measured twice with Heath-Carter soma to type method and selected the average value. Specialists were responsible for the 10 indicators, and a database was established in computer according to age and gender. Calculated the following indicators in turn: endomorphic factor, mesomorphic factor and ectomorphic factor, coordinate values of X and Y on somatotype chart, Height/Weight1/3, mean of dimensional distances from the average somatotype to all somatotypes in the sample,difference between the two somatotypes in three-dimensional space, percentage of body fat and frequency distribution of each somatotype.MAIN OUTCOME MEASURES: Height, body mass, upper arm circum ference, calf circumference, intracondylar diameters of humerus and femur,skinfold of brachial triceps, subscapular skinfold, skinfold of anterosuperior iliac spine, skinfold of gastrocnemius muscle.RESULTS: All the 408 children entered results analysis. ①Height and body mass of 7 to 10 year old children increased as age went up, indicators of Height/Weight1/3 of 7,8,10 year old girls were higher than boys, that of 9 years old boys was higber than girls, which were related to that the growth of height of 8 & 9 year old boys (5.61 cm) was more than girls (3.88 cm).The content of body fat of girls was more than boys. The 3 somatotype values were 3.2-3.9, 2.3-2.6 and 3.0-3.4 in boys and 3.5-4.6, 1.9-2.6 and 3.3-3.5 in girls, so endomorphic factor and ectomorphic factor were the main factors both in girls and boys, and endomorphic gene in girls was higher than boys, which indicated that the content of body fat of rural children in Hulutao city was relatively high, their bodies were finely high and thin, their skeletal muscle was not so muscular and the hypodermic fat in girls was more abundant. Seen from the comparison of somatotype between boys and girls in each age group, the differences between two somatotypes in the three dimensional space of 7-, 8-, 9-, 10-11 year old groups were 0.46, 0.68, 1.03 and 0.61 respectively, except 7-year old group, there were significant differences in somatotype of boys and girls between each age groups (P ＜ 0.01). ②The average value of somatotype of Han boys in rural area was 3.4-2.5-3.2, which belonged to medial type; that of girls was 4.0-2.3-3.4, which beglonged to ectomorphic endomorphic type. Endomorphic factor and ectomorphic factor were the dominant factors both in boys and girls, whereas mesomorphic factor was relatively low; the frequency of somatotype kept changing as the increase of age. ③Compared with the data at home and abroad, the endomorphic factor of the Han children in rural area in Huludao City was relatively high, while the mesomorphic factor was relatively low, and the ectomorphic factor was almost the same.CONCLUSION: The somatotype of Han children in rural area in Huludao City develops better. Their heights are tall, whereas their skeletal muscles are not so muscular. Somatotype development of children is diversified with age.

Objective To study the correlation between the polymorphisms of NR3C1 gene and aggressive behavior in Yunnan Han population.Methods Five SNPs of the NR3C1 gene (rs6190,rs6191,rs6198,rs41423247 and rs56149945) were genotyped in 194 unrelated prisoners who committed violent-crimes and 301 healthy controls using improved Multiplex-ligase-detection reaction(iMLDR) method,and the data were statistically analyzed with the SPSS19.0soflware and PHASE2.1platform.Results Single locus analysis showed that the allelic distribution of rs6191and rs41423247did not show significant differencesbetween the control groupand the aggressive-behavior group as well as the robbery sub-group and intentional injury sub-group.However,significant difference was foundin the rs41423247 genotype distribution betweencontrol groupand robbery sub-group (p=0.048).In addition,there were no significant differences for the four haplotypes between the control group,the attack group,the robbery subgroup and the intentional injury subgroup.Conclusion These findings indicate that rs41423247 polymorphism of the NR3C1gene might play a role in susceptibility to aggressive behavior and rs6191 polymorphismmay not be correlated withaggressive behavior.

Objective To explore strategies and measures to improve hand hygiene (HH)compliance and correctness of health care workers (HCWs)in a large hospital.Methods The WHO multimodal hand hygiene improvement strategy was adopted by healthcare-associated infection(HAI)management department of a hospital,measures consisted of five key com-ponents,including:system change,education and training,evaluation and feedback,reminders in the workplace,and insti-tutional safety climate.HH compliance and correctness of HCWs were observed by infection control practitioners,HH compliance and correctness in January-June of 2012 (pre-intervention)and January-June of 2014 (post-intervention)were compared,effectiveness of intervention strategies were evaluated.Results HH compliance rate and correctness rate of post-intervention were both higher than pre-intervention (75.92% [8 369/11 023]vs 53.67% [5 127/9 553],P <0.001;94.11%[7 782/8 269]vs 83.88%[3 642/4 342],P <0.001).Of different occupations,HH compliance rates of doctors and nurses were significantly different before and after intervention (both P <0.001),while workers and staff of other oc-cupations before and after intervention were not significantly different(both P >0.05).Except ‘after body fluid exposure’, HH compliance rates of the other four indications for HH before and after intervention were significantly different(all P <0.001).Conclusion HH compliance and correctness of HCWs can be improved after adopting WHO multimodal hand hy-giene improvement strategy.

Objective To establish the pyrogen removing effect of activated carbon in the technics of traditional Chinese medicine (TCM) injections. Methods The content of bacterial endotoxin concentration was detected by kinetic turdimetric assay to evaluate the effect of removing pyrogen before and after using activated carbon in concentrated solution of TCM injection. Results The activated carbon adsorption rate of Shuanghuanglian concentrated solution≥70%and the activated carbon adsorption rate of Danshen concentrated solution>95%. Conclusion Pyrogen manufacturing process is scientific and rational by adding activated carbon adsorption in powder injection of TCM. The bacterial endotoxin of large doses can't be removed fully by activated carbon adsorption.

Objective To explore the association of COX-2 Gly587Arg polymorphism with the risk of primary liver cancer.Methods Two hundred and seventy patients with primary liver cancer and 540 health people were selected as our subjects.DNA were extracted from peripheral blood lymphocytes,and genotypes were measured by polymerase chain reaction-restriction fragment length polymorphism method.Odds ratios(OR) and 95％ confidence intervals(CI) were estimated by logistic regression.Results Two kinds of genotype (587Gly/ Gly and Gly/Arg) were found in all participants.No one carried 587Arg/Arg genotype.Among primary liver cancer patients,91.5％ (247/270,) 8.5％ (23/270) of individuals carried 587Gly/Arg and Gly/Arg genotype,which was significantly higher than that of controls (96.5％ (521/540,) 3.5％ (19/540)).Multivariate Logistic regression analysis showed that individual carried 587Gly/Arg genotype had an increased risk of developing primary liver cancer (OR =2.56,95％ CI =1.37-4.79,P =0.003) compared with 587Gly/Gly carriers.Conclusion COX-2 Gly587Arg polymorphism is a risk factor for primary liver cancer in Han.